coondoggie writes: "The US Air Force will launch a second secretive spaceship, the X-37B, tomorrow if the weather holds and all systems are go.

The first X-37B, known as Orbital Test Vehicle 1, launched April 22 last year and stayed in space conducting experiments for some 220 days. The Air Force stated. The ship fired its orbital maneuver engine in low-earth orbit to perform an autonomous reentry before landing, the Air Force stated."